Lionel Messi netted the only goal, as Barcelona were crowned LaLiga champions on Saturday night.
Ernesto Valverde had dropped the Argentine maestro for the visit of Levante, but was forced to summoned him from the bench in the second half, as the game proved to be tougher than expected.
The win means Barca now have a nine-point lead over second placed Atletico Madrid, who beat Real Valladolid earlier in the day.
With three rounds of fixtures left, Atletico cannot catch up with the Catalans anymore.
Messi and co. will now turn their attentions to the Champions League, where they play Liverpool in the semi-finals, for their second trophy of the season.